The age is the Cretaceous period.
这六种和平共处的恐龙所生的蛋的时代都属白垩纪。
The story takes place 6500 years ago in the Cretaceous period.
故事发生在6500万年前得白垩纪晚期。
But I surprised. Is this hedgehog from the Cretaceous period !
还好不疼难道这只刺猬是白垩纪来的？
From the view of stratigraphy, they all belong to the Cretaceous period.
从地层学上看，它们都属于白垩纪。
Xixia ruins belong to the Cretaceous period dinosaur rift sedimentary basin.
西峡恐龙遗址属于白垩纪断陷盆地沉积。
This clam fossil is from the Cretaceous Period, approximately 100 million years ago.
这个蛤化石来自大约一亿年以前得白垩纪时期。
As fossil evidences show,the fossil of taxus were found in the upper Cretaceous period.
根据化石研究表明，红豆杉科得化石发现于上白垩世。
As fossil evidences show, the fossil of taxus were found in the upper Cretaceous period.
根据化石研究表明，红豆杉科的化石发现于上白垩世。
It developed into a lake basin by the subsidence of the earth's crust in the early Cretaceous period.
新第三纪湖盆被挤压回升, 形成单斜断块山。
any of various extinct,toothed birds of the genus Ichthyornis that existed during the Cretaceous Period
鱼鸟生存于白垩纪，现已灭绝的有牙齿的鱼鸟属动物
Depositional characteristics and geomorphological development of red stratum of the Cretaceous period in the Xiuning Basin
休宁白垩系红层盆地的沉积特征和地貌发育
a large carnivorous dinosaur of the Upper Cretaceous Period of North America,characterized by small forelimbs and a large head
上白垩纪北美洲的一种大型食肉恐龙，前肢小且头大
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